Electric incandescent lamp.



No. 672,642. Patented Apr. 23, l90l. L.J. P. HOLLUB &. H. MIGNAL.

ELECTRIC INCANDESCENT LAMP.

(Application filed Nov. 8, 1900.; (Np Model.) 2 Sheets-Sheet l.

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A7706NEYS No. 672,642. Patented Apr. 23, I90l. L. J. P. HULLUB &. H.MIGNAL. ELECTRIC INCANDESCENT LAMP.

(NDYMOGBL) 7 (Application filed Nov-8. 1900" 2 shuns-sheet 2\\\\\\\\\\\l|llIIIIIIIIIIHIII/l/l/ w/rwfsszs- Ute STTES FFICE.

LOUIS JEAN PAUL HOLLUB AND HENRY MIGNAL, OF PARIS, FRANCE.

ELE CTRIC INCANDESCENT LAM P.

SPECIFICATION forming part of Letters Patent No. 672,642, dated April23, 1901.-

Application filed November 8, 1900. berial No. 35,873. (No model.)

To whom it may concern.-

Be it known that we, LOUIS JEAN PAUL HOLL'UB, engineer, of 17 AvenueRapp, and HENRY MIGNAL, gentleman,of 31 Rue Richer, Paris, in theRepublic of France, have invented Improvements Relating to ElectricIncandescent Lamps, of which the following is 1 socket which forms anut.

taken on the line AB of Fig. 9.

a full, clear, and exact description.

This invention relates to improvements in fittings forincandescentelectric lamps, and comprising a T- piece which it is only necessary torotate through ninety degrees in order to fix it in or release it from asocket proa vided with a diaphragm having an oblong aperture throughwhichthis T-piece is adapted to pass.

In order that ourinvention may be readily understood and carried intoeffect, we will U describe the same fully with reference to theaccompanying drawings, in which- Figure 1 is a front elevation of aportion of a lamp embodying our invention and provided with the T-shaped fitting. Fig.2 is

an external view of an improved socket. Fig.

.3 is avertical section, and Fig. a plan view,

tionand upon a larger scale, of a part which constitutes a portion ofthe socket represented in Figs. 7, 8, and 9, this section being Fig. 11rep resents the same part as shown in Fig. 10, but in section on theline C D of Fig. 9. Fig. 12

is an elevation of a modified form of socket with a screw attachment formounting in a Fig. 13 shows in vertical section the modified form offitting represented in Fig. 12. Fig. 14 is a corresponding plan view.Fig. 15 shows a lamp provided with a T- shaped fitting mounted in thesocket and the attachment represented in Fig. 13. Fig. 16 shows, upon alarger scale and in section on the line E F of Fig. 14, the fittingshown in elevation in Figs. 12 and 13. Fig. 17 shows the same fitting insection on the line G H of Fig. 1 1. Fig. 18 shows in elevation ascrew-socket, into which of insulating material 0.

is screwed the fitting represented in Figs. 12, 13, 14:, 16, and 17.Fig. 19 shows the same socket in plan.

As shown in the drawings, the improvements which we have introduced intothe mounting of incandescent electric lamps provided with a T- shapedpart z, as represented in Fig. 1, and which are adapted to be fixed byengaging this T- piece in an oblong aperture B, Fig. 4, and thenrotating it through ninety degrees in order that this T- piece may beengaged beneath a diaphragm d,consist in providing the sockets a, Figs.2 to 6, above the spring-contacts b with a disk The T- piece of the lampbears against this disk when it is engaged or disengaged from thediaphragm d in such a manner that the lamp is always guided. For thispurpose the disk 0 is traversed by two small metal cylinders e, in whichthe spring-contacts b are engaged. This establishes an electric contactbetween the contact-pieces 'ot the attachment and those of the lamp.With this arrangement there is no danger of fracturing the T- piece ofthe lamp in rotating it, which might happen if the disk were notprovided, as the wings of the T- piece might engage between the twocontacts b of the support.

In Figs. 7 to 11 we have shown a modification of the service whichobviates the liability of fracturing the T-piece of the lamp. Thismodification comprises a mass of insulating material f, provided withtwo metal cylinders g g, in which are engaged the Wires of the electriccircuit. The diaphragm d instead of being fixed in the socket Ct isprovided with two guide-r0ds h, with springs t'. In this manner thediaphragm d is movable, owing to the elasticity of the springs, so thaton introducing the T-piece of the lamp into the aperture B of thediaphragm and on rotating it this latter assumes a perpendicularposition, raising the diaphragm slightly. The

wings of the T-piece enter cavities d of the diaphragm and notches j,Fig. 8, formed in the contacts g in such a manner that this T piece maybe manipulated Without danger of fracturing it.

In the modification represented in Figs. 12 to 19 the T-piece alsoengages in an oblong aperture formed in a disk (1. The lampis thenrotated through ninety degrees, as above stated; but the specialty ofthis modification is comprises a metal base 70, which iselectricstantially flush with the top of said body 35 ally connected tothe contact g, while the contact g is electrically connected to a metalwire Z, which completes a portion of the screwthread which is removedupon the support. The support thus constituted screws into the socket 2,Figs. 18 and 19. The base is is in contact with the spring m,arranged-in the bottom of the socket and in electrical com municationwith a metal liner'o, arranged withinthe socket and screw-threaded- Thisliner receives the current coming from the terminal p by theintermediary of a part q.

The forms, details, accessories, materials, and dimensionsofthevarious-devices serving toconstitute our improved lampmay of coursebe varied Without thereby aifecting the principle of our invention.

-We claim 1. The combinationwithalamphavinga'T shaped head, of a socket,a diskor diaphragm therein with a central opening to receive said head,1 said head interlocking with, the dia phragm' when the parts are givenaquarter-- turn, an insulating-body arranged below the said disk andcontacts carriedby said body,,' the'heads of the contacts being'fl'ushorsubwhereby said T-shaped' head is"prevented from entering between thecontacts and be? ing broken when turned to interlock the parts,

substantially as described. 2. The combination with a lamp havinga T-shaped'head, of a socket, a disk or diaphragm therein having an openingthrough which the head can pass to interlock with the under side of thedisk, an insulating-body arranged beneath the disk and contacts carriedthereby, said disk and insulatingbody having movement relative to each,the heads of said contacts being flush or substantially flush with thetop of said body, substantially as described.

, 3. The combination withalamphavingaT- shaped head, of a socket, a diskor diaphragm therein h'aving'an opening through which the head can. passto interlock with the under side of the disk, an insulating-bodyarranged beneath the disk, and contacts carried there- .by, and springsfor drawing the disk toward said insulatingb'ody, substantially asdefscribed. p i 4. The-combination with alain'p havinga T"- sbaped head,of a socket, a di'sktherein" adapted" tointerlock with said head, aninsulatingbod'y below the disk, contacts carr'ied'thercby',

a stem at the end ofsaid socket, electrical connection from one contactto said "stem, the insulated portion having athreaded periphery, a wireforming one 'of' said threads, an'

electrical connection between the wire. and said contact, and a secondsocket, having a liner ad-apte'd to form a contact with said Qwire, anda platein the bottom of the" second socket adapted to form a'contactwith said ;.'stem, substantially as described. I v j Theforegoingspecificatio'n of ourinlpro'vemen ts relating to electricincandes'centlamps signed by fusthis 25th day of O'ctober; 1900".

. LOUIS JEAN PAUL'HOLLUB. HEN RYfMIGNAL. g I Witnesses:

. EDWARD P. M'AoL'EAN,

MAURICE H. PIGN-ET.

